Ceramici Tialitice Cu Voca?Ie Termo-Mecanica Tialite Ceramics With Thermo-Mechanical Vocation

This work is dedicated to studying the synthesis of some ceramic materials, based on aluminum titanate and magnesium oxide addition so that the composition could be found in the binary pseudosystem Al2TiO5-MgTi2O5.The chemically pure raw materials used for synthesis were TiO2, Al2O3 and MgCO3 and the synthesis took place by the solid state reaction method. The powders were heat treated at temperatures between 1200 degrees C-1400 degrees C. The real mineralogical composition of the samples was determined by X-ray diffraction, being observed that, at 1400 degrees C a solid state solution of aluminum titanate structure was formed. The microstructural analysis of the synthetized samples showed that, after the heat treatment process, different shape and size crystals were formed, with dimensions ranging between 4 and 8 pm. The formation of bridges between particles was observed due to the sintering of the samples and the presence of both closed and open pores. Measurement of thermal expansion coefficients showed that they increase with increasing MgTi2O5 content.